The Berkshire Hathaway shareholders meeting is part celebration and part education, and more than 30,000 people gathered to hear Warren Buffett answer to investors Saturday. Buffett and Berkshire Vice Chairman Charlie Munger faced tough questions about Berkshire's prospects for growth and acquisitions, as well as how Buffett handled a vote on pay packages crafted for Coca-Cola executives, a company in which Buffett holds a major stake.